Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

noise in boiler

when my heat kicks on my boiler makes a noise like air is trapped in it. I drained the expansion tank hoping to solve the air lock and the constant overflow occurring due to the high pressured water that with a waterlogged expansion tank had no where to go. the boiler overflow has stopped occuring but the knocking remains. It is an old boiler (1946) with a bladderless expansion tank the make is burnham and it is gas fired


  • Big Ed
    Big Ed Member Posts: 1,117

    Breaking steam with high water temperature ? Broken circulator coulping ?
This discussion has been closed.